Pleasant taste (raspberry is the strongest flavour and tastes quite "jammy").Easy to carry.Easy to open.Liquid enough to slide down easy.No stomach side effects.

None that I have found.

Definately gives me a bit of help on the last half of a 19 mile run. Not sure if it speeds me up or if its just psychosematic but the pleasant flavour makes me feel like i've actually taken in food on a run.

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